Ali DealsAliExpress Dealsν•œκ΅­μ–΄
Sillim Station Exit 8 Intersection, Sillim-dong, Gwanak-guSyaro-sugil Street, Bongcheon-dong, Gwanak-guSeoul Museum of Art Nam-Seoul (former Belgian Consulate), Namhyeon-dong, Gwanak-gu

Population of Gwanak-gu, Seoul

As of September 2026

Total population477,297people
Households291,443households
Average age44.1yrs
Sex ratioMale239,751peopleFemale237,546people50.2%49.8%

Population change

Change over time

4-year trend

Unit: people

487,629 in 2022485,994 in 2023480,225 in 2024479,079 in 2025477,297 in 202620222023202420252026

487,629 in 2022477,297 in 2026

Down 2.1% over the past 4 years.

Migration

As of August 2026

Monthly Overview

Moved in6,817people
Moved out6,953people
Net migrationβˆ’136people

Net migration by month

Unit: people

βˆ’243βˆ’448βˆ’347βˆ’16394578328βˆ’33430βˆ’342βˆ’257βˆ’136SepOctNovDecJanFebMarAprMayJunJulAugβˆ’243 in Sep 2025βˆ’448 in Oct 2025βˆ’347 in Nov 2025βˆ’163 in Dec 202594 in Jan 2026578 in Feb 2026328 in Mar 2026βˆ’334 in Apr 202630 in May 2026βˆ’342 in Jun 2026βˆ’257 in Jul 2026βˆ’136 in Aug 2026

Net inflowNet outflow

Top origins

Unit: people

RegionMoved in
Dongjak-gu449
Seocho-gu174
Suwon-si, Gyeonggi150
Gangnam-gu149
Songpa-gu145

Top destinations

Unit: people

RegionMoved out
Dongjak-gu336
Geumcheon-gu240
Seocho-gu224
Guro-gu206
Yeongdeungpo-gu194

Outflows exceeded inflows in 8 of the past 12 months, for a net loss of 1,240.

Want more detail on migration in Gwanak-gu?See more Gwanak-gu statistics on GData

Population structure

Population by age

As of September 2026

Population by age and sex

Unit: people

Under 1010sπŸ‘‘ 20s30s40s50s60s70s80s90s100+6,77111,68647,97053,16630,92832,90528,62618,7008,23076186,55011,59052,67941,92026,23530,97231,03923,53411,3051,67941

Male 239,751Female 237,546

Age structure

Unit: %

Youth 5.2%Working age 75.1%Seniors 19.7%75.1%19.7%

Youth 5.2%Working age 75.1%Seniors 19.7%

20s is the largest group, at 100,649 people.

Population ranking

Population by region

As of September 2026
RegionShare
Sillim-dong240,26950.3%44.8 yrs
Bongcheon-dong219,95646.1%43.4 yrs
Namhyeon-dong17,0723.6%44.4 yrs

Sillim-dong alone holds 50.3% of the population of Gwanak-gu, Seoul.

Want to explore Gwanak-gu's demographics in more detail?See more Gwanak-gu statistics on GData

Frequently asked questions❓

Gwanak-gu, Seoul has 477,297 residents as of September 2026., 1,782 fewer than a year earlier.
Sillim-dong, home to 240,269 residents (50.3% of Gwanak-gu, Seoul).
It is 44.1 as of September 2026., 1.6 years below the national average of 45.7. Among its neighborhoods, Bongcheon-dong is youngest at 43.4 and Sillim-dong oldest at 44.8.
It fell 2.1% over 4 years, from 487,629 in 2022 to 477,297 in September 2026.
As of August 2026, the most people moved in from Dongjak-gu (449) and the most moved out to Dongjak-gu (336). Outflows exceeded inflows in 8 of the past 12 months, for a net loss of 1,240.
This is resident registration data from Korea's Ministry of the Interior and Safety. Figures are as of the end of September 2026 and are updated monthly. The data is open under KOGL Type 1.
Resident registration counts people at their registered address. The census counts them where they actually live. The gap is widest in university towns and industrial areas, where many people never change their registered address.

Sources 🌐